Dry battery



Nov. 5, 1929.

M. ZERNER ET AL DRY BATTERY Filed April l0, 1928 Mm i A aux@ PatentedNov. 5,H 1929 UNITED STATES PATENT OFFICE IMAX ZERNER, OF NEW YORK, ANDOTTO KARL REINHARDT, OF JAMAICA, NEW YORK, ASSIGNORS, BY MESNEASSTGNMENTS, TO BOND ELECTRIC CORPORATION, OF JERSlEYi.r CITY, NEWJERSEY, A CORPORATION OF DELAWARE I DRY BATTERY Application filed April10,

This invention relates to dry batteries of the type employing aso-called bobbin consisting of a mass of depolarizing material moldedabout a carbon rod which is adapted to function as an electrode, thedepolarizing material being enclosed Within a bibulous envelope ofsuitable material, such as a Wrapper of cheese cloth.

The general objects of this invention are to provide simple and reliablemeans for securing the wrapper in place about the depolarizing material,and also to provide simple and reliable spacing means for acili tatingcentralizing the bobbin Within its container during the assemblingandtor thereafter maintaining the bobbin properly spaced from the wallof its container.

The invent-ion will be understoodnfrom the following description takenin connection With the accompanying drawings, in which Figure 1 is aside elevation of a bobbin embodying this invention, showing also thecontainer for the bobbin, the latter being in vertin cal section; Figure2 is a plan vieW of the bobbin except that a disc of insulating materialat the top of the bobbin is omitted; Figure 3 is a bottom view of thebobbin; and Figure 4 is a. view similar to Figure l but showing amodified form of means for securing the envelope in place thereon.

In the drawings the usual zinc container 5 is indicated as having acylindrical side' or Wall 6 and a bottom 7 soldered thereto. The bobbinis shown as including a carbon rod 8, having a metal cap l), and acylindrical body of depolarizing material 10 molded about the rod. Themolded depolarizing materiali() is confined withina suitable envelope,such as a Wrapping of cheese cloth 1l, the longitudinal margins of whichoverlap each other, as shown in Figures 1 and 4, and the upper and lowerends of which are folded inwardly over opposite ends ofthe depolarizingmaterial. The folded portions 12 at the bottom of the depolarizingmaterial 10 overlap each other, as indicated in Figure 3, and are heldin a proper relation to each other by a suitable material, such as acoating of paratlin, not shown.

Around the depolarizing material 10 and 1928. Serial No. 268,875.

in close engagement with the envelope carried thereby, are a pair ofspacing elements, These spacing elements are in the form oit cords l5which are spaced from each other and are of suoli lengths, respectively,that their opposite ends overlap to an appreciable extent. 'Theoverlapping ends of the cords'15 are secured together by a suitablematerial, such as sealing wax, 16, which is applied While in a meltedcondition so as to enable it to closely adhere to the overlapping ends,Where by such ends` are effectively united to each other. These cords 15are relatively large in cross section, and serve to center the bobbin itis introduced into its container 5 and also serve to thereaftermaintain. the bobbin properly spaced trom the Wall of its container.

Referring to Figures l to 3 inclusive, the folds 1Q of the cheese cloth11 at the upper end of the bobbin are united to each other by a coatingot suitable material, such as paraliin not shown, and are held in a flatcondition about the carbon electrode 8 and in a fixed relation withrespect to each other by a Washer 18 of insulating material, such ascardboard which encircles and frictionally engages the carbon electrode8, so that it may be maintained in firm engagement with the folds 12 otthe envelope at the upper end of the dee polarizing material when it ispushed down over the carbon electrode before the met-al cap 9 is appliedthereto. The Washer i8 is preferably coated with a suitable material,such as paraffin not shown, whereby the Washer is rendered impervious tomoisture, as will be readily understood.,

Referring to Figure fl, wherein is shown a modihed forni of theinvention, the folds 12 of the cheese cloth 1l at the upper end of thedepolarizing material l0 term a neck 20, sur rounding the carbonelectrode 8, about which a cord 2l is Wrapped., This cord serves toholdthe neck 20 of the cheese cloth in close engagement with the carbonelectrode 8, and is preferably secured in position, by Wrapping the lastfew turns of the cord over the remaining turns of the cord While undersut iicient tension to imbed such last tevv turns of the cord into theremaining turns, thereby obviating the necessity of knotting or other-Wise similarly tying the ends of the cord together. If desired, the cord21 may be coated with a suitable adhesive so as to effect its intimateunion with the neck 20 and to also e'ect intimate union of the severalturns of the cord with eaeh other.

1While `eert-ain embodiments of the invention are herein shown, it willbe understood that various changes may be made with re' spect theretoWithout departing from the spirit of the invention or the scope of thefollowing claims.

"What is claimed is:

l. A battery bohbin comprising an eleetrode having depolarizing materialsurrounding the saine, and a cord surrounding said depolarizing materialand serving as a spaeing member, said cord having its opposite endsoverlapping each other and adhesively united to each other.

2. i battery bobbin comprising an electrode having depolarizing materialsurrounding the same, and a plurality of cords surrounding saiddepolarizing material in a l spaced relation to each other and havingtheir respective opposite ends overlapping and adhesively united to eachother.

in testimony whereof, We have affixed our signatures to thisspecification.

MAX ZERNER. @TTG KARL RENHARDT.

